GB359318A - An improved process for producing diarylguanidines - Google Patents

An improved process for producing diarylguanidines

Info

Publication number
GB359318A
GB359318A GB628/31A GB62831A GB359318A GB 359318 A GB359318 A GB 359318A GB 628/31 A GB628/31 A GB 628/31A GB 62831 A GB62831 A GB 62831A GB 359318 A GB359318 A GB 359318A
Authority
GB
United Kingdom
Prior art keywords
lead
sulphate
chloride
regenerated
treated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB628/31A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SILESIA VER CHEMISCHER FABRIKE
Original Assignee
SILESIA VER CHEMISCHER FABRIKE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SILESIA VER CHEMISCHER FABRIKE filed Critical SILESIA VER CHEMISCHER FABRIKE
Publication of GB359318A publication Critical patent/GB359318A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C277/00—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
    • C07C277/08—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups of substituted guanidines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In the process of the parent Specification for the manufacture of symmetrical diarylguanidines by the action of ammonia under pressure on diarylthioureas suspended in benzene, toluene, xylene or other organic solvents, the metallic oxides employed as desulphurizing agents are replaced by lead salts, particularly lead chloride and lead sulphate, with or without the addition of sodium carbonate. The lead salts may be regenerated from the lead sulphide formed in the reaction by treating it with hydrochloric or nitric acid. In the latter case, in addition to lead sulphate, a certain amount of lead nitrate is formed and under the conditions of the reaction is converted into lead oxide, the mixture of oxide and sulphate so formed being suitable for re-utilization. In examples: (1) thiocarbanilide suspended in benzene is treated with ammonia under 5 atmospheres pressure in the presence of a mixture of fresh or regenerated lead chloride and sodium carbonate, producing diphenylguanidine; (2) fresh or regenerated lead sulphate is employed as desulphurizing agent in the process of (1); (3) a mixture of lead chloride and sulphide from the desulphurization is treated with hydrochloric acid to regenerate lead chloride; (4) lead sulphide from the desulphurization with lead sulphate is treated with nitric acid to regenerate lead sulphate.
GB628/31A 1930-11-27 1931-01-07 An improved process for producing diarylguanidines Expired GB359318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE359318X 1930-11-27

Publications (1)

Publication Number Publication Date
GB359318A true GB359318A (en) 1931-10-22

Family

ID=6291144

Family Applications (1)

Application Number Title Priority Date Filing Date
GB628/31A Expired GB359318A (en) 1930-11-27 1931-01-07 An improved process for producing diarylguanidines

Country Status (1)

Country Link
GB (1) GB359318A (en)

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